Transfer of Electrons
When an object is negatively charged, the electricity does all it can to regulate itself by trying to get rid of the excess electrons.
There are three different ways to transfer electrons from one object to another.
Friction is the transfer of electrons to another object by rubbing something against something else. An example would be rubbing a balloon on your hair.
Conduction is the transfer of electrons to another object by direct contact. An example would be touching a metal doorknob when you are negatively charged.
Induction is the movement of electrons to another object by the electric field. No touching is involved. An example would be lightning striking.